I ordered a few of these and they were perfect, XL fit my 14 year old best (who seems to have some XL teen sizes and some S adult sizes), L fits my 12 year old. You say comfortable, not too transparent, just right.
Arctix Youth Pants Reinforced: Large Boys' Clothing for Active Adventures
46 Review
🔥 Stay Warm and Active with Rocky Fleece Thermal Underwear Bottoms for Boys
44 Review
👕 Bold Pack Sleeve Active Hoodie Sweatshirt Set for Boys' Clothing - Stylish and Comfortable!
47 Review
👖 Boys' Outdoor Climbing Convertible Trousers - Waterproof | Clothing
47 Review