ergowear midcut slk se long boxer micro mesh 3d pouch in peach birds 1775 89Every SLK SE Midcut is manufactured using Ergowear signature polyester elastane micro mesh fabric a polyester microfiber with tiny holes in the construction to allow for extra breathability Additionally, elastane is blended in to make it adaptable to the body. As a result, this fabric combines the three most desirable properties for underwear: Breathability through clever construction, elasticity through elastane and resistance since polyester is one