Abstract: A tray assembly is provided. The assembly comprises a tray, at least one width reinforcement component affixed to the tray, and at least one length reinforcement component affixed to the at least one reinforcement component.

Abstract: A clip system for attaching accessories to headgears is provided. The clip system comprises a clip assembly having a first clip attachable to a first accessory, and a first clip-receiving adaptor attachable to a headgear. The first clip-receiving adaptor receives and fastens the first clip.

Abstract: A plant growing tray system, comprising a plurality of trays sequentially connected to each other via substantially impermeable inter-tray joints. Each of the plurality of trays extends between respective first and second lateral ends and has a respective plant growing space portion vertically recessed relative to respective first and second lateral ends in-between. Each inter-tray joint includes a male part positioned at a first horizontal longitudinal end of a tray and elongated between the respective first and second lateral ends of the tray, a female part complementary to the male part positioned at a second horizontal longitudinal end of an adjacent tray and elongated between the first and second lateral ends of the adjacent tray, and a substantially impermeable interstitial medium configured to be compressed between the male and female parts to generate residual stresses to at least partially support a tray load and mitigate leakage.