They are very similar to the cotton pajamas my kids love, but a little thicker. In the photo, I turned the sleeve inside out to show the material. Personally I think they are true to size but if they still tilt they run small. My son is very skinny/small size 10 so M is a little smaller for him and L is a little loose at the waist. I have white ones for my son to wear under his skinny Stormtrooper costume for Halloween. He really likes them and we're thinking of getting some more pairs to wear as pajamas. They are also very comfortable to wear under clothing on snowy days. I am completely satisfied with my purchase!
Amazon Essentials Snug Fit Pajamas - Stylish Boys' Sleepwear & Robes Collection
44 Review
π The Children's Place Kids' Holiday 2 Piece Cozy Cotton PJs
43 Review
VAENAIT BABY Kids' Soft and Comfy Modal Tencel Sleepwear Set for Boys and Girls - 12M-12Y, Shirring Solid Pajamas
46 Review
Snug-Fit Cotton Pajama Sleepwear Sets for Kids featuring Disney, Star Wars, and Marvel by Spotted Zebra
54 Review
Funny Guy Mugs Tearaway Sweatpants: Playful Boys' Clothing for Fun and Active Days
49 Review
Waterproof Cozy-Dry Rain/Snow Pants for π§ Kids by JAN & JUL, with Fleece Lining
64 Review
Boys' Adidas Active Sports Tricot Athletic Clothing
45 Review
π Fruit of the Loom 6 Pair Cushion Ankle Boys' Clothing: Comfy and Stylish Selection for Active Boys
57 Review