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Boys' Thermal Underwear Sets
Great to wear indoors as pajamas, as well as outdoors as a thermal layer.
These kids thermal long johns and long sleeve shirts have the perfect blend of comfort, warmth, elasticity and breathability.
The children's winter base layer fits snugly enough to be comfortable under clothes, even under jeans, without getting in the way of sports and play.
experience unmatched comfort
THERMAL UNDERWEAR FOR KIDS
Wrap yourself in pure comfort and warmth with the Celfaeree boys' thermal set making lounging cozier than ever before. Its seamless design is all about unrivalled style and comfort.
TheUnboxShot
June 25, 2025
This thermal set is fantastic, and my kid loves it! The fabric is soft and comfortable, with a cozy fleece lining that keeps him warm, whether he’s playing outside or relaxing indoors. He’s worn it about 4-5 times now, and even after washing, it still looks and feels great with no issues.The material has a nice stretch, so he can move freely without feeling restricted. It’s also moisture-wicking, so he stays dry and fresh all day. Perfect as a base layer for cold-weather activities or just for lounging. This set is a must-have for winter!
Sarah S
June 14, 2025
Great hockey undergarments! Good quality and very warm.
Lilian da Silva Cordeiro
April 22, 2025
I bought the set for my 6 year old son and I was surprised with the quality of the products.Just about the size, we have to be carefully because it shows that XS size fits 7/8 years old, however, it fit well my boy even though he is just 6yo.
Kimberlee Harris-Kelsey
April 8, 2025
This is very warm and cozy helps my son in the Canada winter weather
rdobina
March 26, 2025
I bought these for my kids to wear as a base layer on very cold days, but they love them so much they’ve been wearing them as pajamas. They’re very soft inside, and the fabric is nice and stretchy. XL fits both my 11 year old and 13 year old perfectly. I just purchased another set!
Teji Kaur
February 23, 2025
I like the fit and the comfort of the clothes, they are warm, the quality is actually good and I like the design of the outfit
Nishant
January 19, 2025
Very warmth and fitting is great
The Reviewer
January 7, 2025
We tend to do many outdoor activities in the cooler months. We often go for walks in our local park, go tobogganing, go skating and we also have our kids enrolled in outdoor activities from late summer to the fall in which they need base layers while sitting on the bench or for travel to and from their sporting activities. The Ceifaeree thermal underwear is a great solution for base layers on the cooler and colder days. The material allows some breathability but tends to make our kids sweat a little more when they are active. I would not suggest our kids go full out while wearing this as they risk cold exposure by sweating more. The usefulness of this thermal underwear set is for lighter activities and when the kids have to sit or stand for long periods outside. The colours are negligible as they are worn under clothing. The underwear set washes with a normal load load and you can dry it on a regular cycle. Depending on your kid's height and weight you may have more or less room and fit. Overall a good base layer for general cooler weather activities.
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