4-point woven nylon suspension. Accommodates chin strap. Vents on top of hard hat increase air circulation, keeping your head cool and comfortable all day. Google retaining slots on suspension. Moisture wicking brow pad is removable, washable and replaceable. Meets the low temperature (LT) option of the Z89.1 standard. Side-lock or Mega ratchet size adjustment for head sizes 6.5-8. SEI Certified. Made in USA.