- 100% Merino
- Flatlock side seams prevent chafing
- SmartWool is guaranteed not to itch and can be repeatedly washed and dried without shrinking
- With a UPF 30 rating fabric provides very good protection against harmful ultraviolet rays
- Please note SmartWool midweight long underwear crew top runs big to accommodate for growth and 2 - 3% shrinkage in length during the first wash



