The Hybrid Ventx Undershort is a breathable, lightweight undergarment designed for comfort. 4.5 ounce 4-way performance stretch Ventx fabric legs, with a softer center panel for an ideal feel against the skin. Xcel Ventx is rated UltraViolet Protection Factor (UPF) 30 for Very Good sun protection, blocking over 95% of harmful UVA/UVB radiation from the sun. Comfortable flatlock seams lie smooth against the skin; the no inseam design helps prevent chafing and rash. Moisture wicking, lightweight, and quick drying with a relaxed fit. Elastic waistband.