The RZ M2.5 Mesh is a slightly different take on our popular M2 Mesh. Both feature the same highly breathable, comfortable, and durable mesh fabric construction that helps to keep you cool on even the hottest summer days. However, rather than using the single strap closure of the M2, the M2.5 opts for a flexible dual elastic strap system with quick-release buckles. This adds an extra touch of security and comfort, making it ideal for exercise and movement, or when you must wear your mask for an extended time. Like other RZ Masks, it features our standard F1 filters, blocking 99.9% of particulates down to .1 micron in size – helping you and your loved ones Breathe Safe.