A mask assembly suitable for the treatment of sleep disordered breathing, comprising: a mask to provide pressurized air to a patient upper and lower slot features located on each side of the mask a headgear assembly, comprising: a back portion a pair of upper straps provided to the back portion, each upper strap having a loop portion and a hook portion at a free end thereof for releasably attaching to the loop portion a pair of lower straps extending away from the back portion, each lower strap having a loop portion and a hook portion at a free end thereof for releasably attaching to the loop portion and a connection region of each loop portion of each strap, the connection region being adapted to receive a respective hook portion, the connection region being wider than each respective hook portion along each respective hook portions entire length.
