A buckle assembly has two buckle portions, each having a base body with a fastening hook and a fastening recess, and a magnet connected to the interior surface. The buckle portions are configured such that placing the interior surface of one buckle portion against the interior surface of the other buckle portion causes the magnets to engage each other and the fastening hook of each buckle portion to enter the fastening recess of the other buckle portion, to lock the two buckle portions together and prevent disengagement under tension in opposing directions parallel to a longitudinal extent of the buckle assembly. There is a fastening tenon connected to the base body and extending into the fastening recess on each of the buckle portions. The fastening hooks engage a respective one of the fastening tenons as the fastening hooks enter the fastening recesses to lock the two buckle portions together.

A buckle assembly has two buckle portions, each having a base body with a fastening hook and a fastening recess, and a magnet connected to the interior surface. The buckle portions are configured such that placing the interior surface of one buckle portion against the interior surface of the other buckle portion causes the magnets to engage each other and the fastening hook of each buckle portion to enter the fastening recess of the other buckle portion, to lock the two buckle portions together and prevent disengagement under tension in opposing directions parallel to a longitudinal extent of the buckle assembly. There is a fastening tenon connected to the base body and extending into the fastening recess on each of the buckle portions. The fastening hooks engage a respective one of the fastening tenons as the fastening hooks enter the fastening recesses to lock the two buckle portions together.

An orthopedic device includes a frame, a strap system including first and second straps connecting to the frame, and an adjustment mechanism couples to the first and second straps and simultaneously regulates tension in the first and second straps by moving the first and second straps relative to the frame. The strap system includes a length adjustment system for modifying the length of the strap.

A mask assembly including a mask frame with a central conduit connection aperture and lateral arms having a 3-D curvature. The lateral arms extend: outwardly from a center of the frame, rearwardly, towards the patients ears, and upwardly, along a vector passing from below the nose to a point between the temple the top of the ear. The mask assembly can include an anti-rotation feature which limits or prevents rotation between straps of a headgear, and the mask frame. The mask assembly can include a buckle for a closed loop headgear, the buckle being formed with a plurality of openings and posts configured to form an angled headgear strap path through the buckle through which part of a headgear strap loop can pass.

A mask assembly including a mask frame with a central conduit connection aperture and lateral arms having a 3-D curvature. The lateral arms extend: outwardly from a center of the frame, rearwardly, towards the patients ears, and upwardly, along a vector passing from below the nose to a point between the temple the top of the ear. The mask assembly can include an anti-rotation feature which limits or prevents rotation between straps of a headgear, and the mask frame. The mask assembly can include a buckle for a closed loop headgear, the buckle being formed with a plurality of openings and posts configured to form an angled headgear strap path through the buckle through which part of a headgear strap loop can pass.

A weightlifting belt includes a flexible strap portion with a first major surface (e.g., a front), a second major surface (e.g., a back), a first longitudinal end, a second longitudinal end, a first lateral side, and a second lateral side. An anchor assembly is in contact with the first major surface of the flexible strap portion near the first longitudinal end of the flexible strap portion. A lever-actuated hook assembly is in contact with the first major surface of the flexible strap portion near the second longitudinal end of the flexible strap portion. The lever-actuated hook assembly is configured to engage the anchor assembly so as to hold the first longitudinal end of the strap portion close to, or in physical contact with, the second longitudinal end of the strap portion so as to form a loop that can fit around a waist of a human.

A weightlifting belt includes a flexible strap portion with a first major surface (e.g., a front), a second major surface (e.g., a back), a first longitudinal end, a second longitudinal end, a first lateral side, and a second lateral side. An anchor assembly is in contact with the first major surface of the flexible strap portion near the first longitudinal end of the flexible strap portion. A lever-actuated hook assembly is in contact with the first major surface of the flexible strap portion near the second longitudinal end of the flexible strap portion. The lever-actuated hook assembly is configured to engage the anchor assembly so as to hold the first longitudinal end of the strap portion close to, or in physical contact with, the second longitudinal end of the strap portion so as to form a loop that can fit around a waist of a human.

A slipcover hook includes a first closed ring and a second open ring connected to the first closed ring. The second open ring has a slot located in spaced relation to the lateral sides of the hook. In one embodiment, the intermediate slot is located equidistantly from the lateral sides (i.e., in or proximate to the center). The first and second closed ring are coplanar. The central opening is configured to permit the passage of a loop of fabric through the gap or opening so that the loop can be introduced into or removed from the second opening.

A slipcover hook includes a first closed ring and a second open ring connected to the first closed ring. The second open ring has a slot located in spaced relation to the lateral sides of the hook. In one embodiment, the intermediate slot is located equidistantly from the lateral sides (i.e., in or proximate to the center). The first and second closed ring are coplanar. The central opening is configured to permit the passage of a loop of fabric through the gap or opening so that the loop can be introduced into or removed from the second opening.

A system for attachment to webbing has an attachment portion and an operating portion that can be attached to and detached from each other. The attachment portion has a base body with a cavity, a transverse bar, and two locking hooks. The operating portion has two side legs, top sections connected to the side legs, a gap between the top sections and a locking hook on each of the top sections. The operating portion is connectable to the attachment portion by pressing the legs together and inserting the locking hooks of the operating portion into the base body, and then releasing the legs so that the locking hooks of the attachment portion and operating portion engage each other. The operating portion is detachable from the attachment portion by squeezing the legs together until the locking hooks on the operating portion clear the locking hooks on the attachment portion.