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Best Boys' Exercise & Fitness Apparel

Under Armour Boys' Brawler Warm-Up Pants
Smooth tricot knit exterior with a brushed interior for soft comfort and warmth.
Reviews
"I bought these pants for my 8 year old son who is of average height and weight."
"it fits him little longer because he is a small boy but he will grow it."
"great pants that hold up very well for a young boy."
"very nice pant - good quality - ordering more."
"Love these pants fit great and wear great."
"Fit perfect on my son, loves them!"
"Were very long, had to hem."
"I bought for my son and size is Youth xl."
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adidas Boys' ClimaLite Boxer Brief (2 Pack)
Elevate your workout with adidas' Sport Performance Climalite Boxer Briefs. 91% Polyester/9% Spandex.
Reviews
"My 10 year old son loved these!"
"He does say that they ride up during football practice but otherwise loves how stretchy they are."
"I originally bought the size small for my seven year old but they were too small on him, they do fit my five year old perfectly however, so everything worked out."
"My son loves the fit and feel."
"Bought for my very picky son when it comes to soft materials) & he loves!"
"They have held up to summer camp and a lot of washings."
"My son loves these and will not wear anything else now."
"I based the size I ordered on the size my son was currently wearing."
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Under Armour Boys' Pennant Tapered Pant
Durable knit fabric with a smooth face & a soft inner to trap warmth. 100% Polyester.
Reviews
"The companies need to start making pants, across the board, longer for people."
"Son is 10 and normally wears a medium and this is much too big."
"They fit great."
"Very nice pants."
"Overall fit and comfort!"
"My 12 year old is very happy with these joggers."
"My son is extremely petite for an 11 year old so we have a hard time finding stuff that fits but these are true to size and he loves them!"
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Best Boys' Workout & Training Hoodies & Sweatshirts

PUMA Boys' Big Cat Hoodie (Little Kid/Big Kid)
Pull over hoodie with embroidered applique PUMA logo. Machine Wash. Long-sleeve hoodie featuring contrast pattern on hood lining and chest logo.
Reviews
"This is my son's favorite sweatshirt!"
"Cozy, fits as expected, my boys feel cool wearing this because there is nothing better than looking like a head to toe highlighter."
"Nice material."
"Very nice quality!"
"size matters... you are lucky you buying on amazon and they give you free return if the item is not as expected or as description."
"Shinny color and it fits my son well!"
"Terrible , runs small, smaller than the same size bought at the store.. Order larger size and don't waste your time having to return and exchange ."
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Best Boys' Workout & Training Jackets & Vests

TYR Youth Alliance Parka
Founded in Huntington Beach, CA by swimwear designer Joseph DiLorenzo (current owner) and 1972 Olympic Bronze Medalist Steve Furniss, TYR Sport was established in 1985 to provide the competitive swim market with vibrant, performance-driven prints. On a relentless path to push the limits of sportswear we not only reimagine technologies for enhanced competitive performance, but also embrace lifestyle markets to accommodate athletes and water enthusiasts at every level. INNOVATIVE DESIGN - Designed to embrace the elements, pull tab zippers, Velcro sleeve closures and a barrel lock hood bungee locks out cold, while front and back venting allow for temperature regulation.
Reviews
"I bought this swim jacket for my 5 1.2 yr old daughter so I knew it would be big but it would last for a long time and she would grow into it."
"I ordered from Amazon because this was out of stock on the Team sponsored company."
"This is a popular Parka around the swim club."
"Great Quality Swim Parka!"
"My 7 year old wears this after practice, keeps her nice and warm especially during winter."
"This is perfect for our swimmer!"
"The sleeves are a little too long which is not a big deal because I planned on rolling them up."
"My son doesn't like how small the hand/wrist holes are."
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Best Boys' Workout & Training Pants

Under Armour Boys' Storm Fleece Big Logo Pants
UA Storm gear uses a DWR finish to repel water without sacrificing breathability.
Reviews
"These fit my son really well."
"These are great athletic pants."
"My son loves these sweats."
"Great quality, a year later and they still fit!"
"Perfect for cold California weather...will buy again."
"HAD TO RETURN, TO SMALL FOR SIZED ORDERED."
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Best Boys' Workout & Training Shirts

Under Armour Boys' Big Logo Long Sleeve Shirt
UA Tech fabric is quick-drying, ultra-soft & has a more natural feel. 100% Polyester.
Reviews
"He’s just now in a size 5 so it’s a tad big but he’s on the smaller side."
"Maybe it's just me but UA runs small!"
"It's Under Armor quality."
"I don’t know how it fit because it was a gift."
"High quality, durable material."
"Under. Armour is well loved by grandchildren and it is a good quality shirt."
"The size label was stuck on over the Brand logo on the front."
"My great nephew loved this shirt!"
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Best Boys' Workout & Training Shorts

Under Armour Boys' Eliminator Shorts
100% Polyester.
Reviews
"Great fit and love the fabric."
"Because the legs are a bit longer than other athletic shorts my son is happy it doesn't show his undies when he's upside down."
"An OK quality paif of shorts."
"These basketball shorts are excellent - great colours and great fit!"
"I brought small size for my 10 years old boy last year, it's just fitted now."
"Great fitting quality shorts as expected from Under Armour."
"Under armour is a great quality. Unfortunately I got the wrong color item..."
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Best Boys' Workout & Training Socks

Under Armour Youth Crew Socks (6-Pair)
CEO Kevin Plank's goal was to change the way athletes dress and give them unprecedented advantages. Signature Moisture Transport wicks moisture, accelerates evaporation.
Reviews
"nice, but they get holes just as fast as cheap brands."
"With 3 little boys these work great."
"Kid socks in my house last about a week till they are lost."
"Shrinks up and has a considerable amount of interior fuze that takes several washes to eliminate."
"bought these for my 2 boys."
"9-year old son says he loves them."
"The boys at my son's school are obsessed with UA clothing."
"Good quality socks Fit my son perfect who wears a youth 4 shoe."
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Best Boys' Workout & Training Tanks

Under Armour Boys' HeatGear Armour Sleeveless Fitted Shirt
HeatGear fabric is ultra-soft & smooth for extreme comfort with very little weight. Moisture Transport System wicks sweat & dries fast.
Reviews
"I really love this item it came as described and very well packaged the quality of the item is far better than any I have purchased before also the packaging was very secure I would not hesitate to purchase this item from this seller again."
"Fits great and my son loves it."
"My son love this tank, he wear it little to much lol guess I have to buy more."
"Great quality love the shirt for my son."
"Shipping is fast."
"great quality- would buy again."
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Best Boys' Workout & Training Tracksuits

PUMA Little Boys' Logo Tricot Set, Castlerock, 2T
100% Polyester.
Reviews
"I bought sz 5 for my slightly tall 5 year old and it fits great and we'll get plenty of use this fall and probably through spring."
"He was so happy to have new pants toatch the shirts that still fit from Christmas and even more delighted that he now has a jacket too."
"Grandson looks like he's just finished training with the All Blacks :-) Very nice material, pants are a little long but hey - he'll grow..."
"These were perfect with nice sneakers and styled hair, they looked adorable and stylish while still being comfortable!"
"My son loves this outfit but it fits closer to a size 5."
"Grandson (6 years-old) loves his new outfit."
"This outfit is so cute."
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Best Boys' Activewear

Southpole Big Boys' Active Basic Jogger Fleece Pants
Southpole signature active line fleece jogger pants that gives you comfort and movement. Machine Wash. SP active is an active sports line of Southpole.
Reviews
"I saw other comments so I ordered a small even though my son is 9 1/2, 75lbs and usually wears a Medium."
"I like the fit of these on my son."
"Joggers are all the rage this year, and y eleven year old grandson was thrilled with these joggers."
"The fabric feels good, is moderately thick and good quality, the stitching hasn't come undone anywhere, and there's just very minor pilling."
"These were quite large for a size 8."
"I actually received the size medium before I was even able to return the large."
"I'd probably recommend these for wider waisted kids, but not for any slim waisted kids."
"The fabric had a really strange texture to it and the seam in the bottom was finished off extremely sloppy. **See photos** Now he's worn them two days and they are already pilling at his knees and thighs."
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Best Boys' Sports Compression Tops

Men's Boys TCA Pro Performance Compression Base Layer Long Sleeve Thermal Top
Built to contour to your body with a light and tight compression fit, key muscle areas are supported enhancing performance levels and reducing fatigue. Quickdry fabric rapidly draws sweat from the skin keeping you dry, light and comfortable at all times. Breathable fabric regulates body temperature for higher performance in all conditions.
Reviews
"This is a decent compression shirt that I find best for use while cycling as a base layer between 45 and 60 degrees."
"I purchased a size large, and it fits as expected for a compression shirt. It is comfortable, and it does add warmth when worn as a base layer under a jacket or other long-sleeved shirt - but by itself when not exercising, I found myself a bit colder than I would be/compared with a cotton long-sleeved shirt or "real" thermal underwear because this is not thick at all."
"Men's medium seems to be more towards a tall and athletic build, I am guessing the other sizes are the same."
"In use for several month now and I am very satisfied with the purchase."
"Great for the price."
"Size aside (slightly smaller then expected)."
"I am not sure if it was me misunderstanding the sizing or poor description of the product but this top is too large."
"He hates wearing base layers under his soccer jerseys but really likes this one."
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Best Boys' Sports Compression Apparel

Lanbaosi Boys & Girls Sports Thermal Compression Base Layer Legging/Tights
Size 5 :Height 45"-47" Weight 42lbs-46lbs. Size 7:Height 50"-52" Weight 53lbs-58lbs. Size 10:Height 54"-57" Weight 60lbs-65lbs. Size 12: Height 58"-60" Weight 67lbs-72lbs. Fit for Outdoor and indoor using,Running,basketball,football,baseball,cycling,bike.
Reviews
"Ordered 2 pair, one for my 8 year old and another for my 12 year old."
"My boy loves it."
"Bought them for my 9yo son to wear under under his shorts when playing flag football."
"Fit perfect."
"Nice but size 5 is too large for my average size 5 year old."
"Fits well, but crotch area is really wide."
"Perfect for a sports guy who needs something to wear I The winter under his running shorts!"
"My son loves his new soccer pants!"
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Best Boys' Athletic Underwear

adidas Boys' ClimaLite Boxer Brief (2 Pack)
Elevate your workout with adidas' Sport Performance Climalite Boxer Briefs. 91% Polyester/9% Spandex.
Reviews
"My 10 year old son loved these!"
"He does say that they ride up during football practice but otherwise loves how stretchy they are."
"I originally bought the size small for my seven year old but they were too small on him, they do fit my five year old perfectly however, so everything worked out."
"My son loves the fit and feel."
"Bought for my very picky son when it comes to soft materials) & he loves!"
"They have held up to summer camp and a lot of washings."
"My son loves these and will not wear anything else now."
"I based the size I ordered on the size my son was currently wearing."
Find Best Price at Amazon