What are Physio Room.com Compression Shorts (0.5mm)? Great value, thin neoprene compression base layer shorts for treatment & prevention of groin, thigh & hamstring injuries. When can I use them? For the treatment & prevention of Hamstring, Groin & Thigh injuries, such as Hamstring strains, Thigh strains, Groin strains, Osteitis Pubis, Pubalgia, Sports Hernia & Gilmores Groin. Superb base layer shorts for skiing, snowboarding & other outdoor winter activities This thin (0.5mm) version supports without restricting movement. How do they work? The compression & warmth provided by Physio Room.com Compression Shorts (0.5mm) is ideal for the treatment & prevention of thigh, groin & hamstring muscle strains. The compression provides physical support & reassurance, while the therapeutic heat helps to increase & retain muscle temperature. This increases the extensibility of the tissues & reduces the risk of injury. Youth 60-70cm (23.5-27.5)