OVER-UNDER hook and loop closure with a LOCKDOWN drawstring featuring non-slip silicone treads * COMBAT CUT waistband allows the freedom of movement required by any martial arts discipline * 3XRS triple reinforced seams provide unmatched strength and durability * Constructed from VASTEK? charcoaled bamboo fibers that retain bio-thermal heat essential to intermuscular vascular flow * FULL GUARD protection infused with antimicrobial polymers and an antiseptic coating to neutralize common causes of odors