Mason jar blackout sleeve: compatible with a regular wide mouth mason jar or other jars of the same size. Widely used and convenient for sprouting and light control. Sprout jar cover: made from cloth material; durable light protection cover that can be easily cleaned for repeated use. Reusable as a sprouting sleeve. Mason jar replacement shades: simply place the jar into the sleeve. The sprout jar shade cover is simple to use and convenient. Mason jar covers sleeves: with the mason jar grow cover, you can control the light for different sprouts. Compatible with wide mason jars for flexible use. Benefits and features Function: blocks light to support sprouts and germination, helping you manage light exposure during sprouting. Compatibility and size: designed for standard widemouth mason jars and other jars of the same size, offering broad applicability. Material and durability: cloth construction provides durable light protection and longlasting reuse, with easy cleaning after use. Convenience and usability: slip the jar into the sleeve for quick setup; no tools required; easy to or swap between jars. Versatility: acts as a blackout sleeve, sprout jar cover, replacement shade, and grow cover to regulate light for different sprouts. 23 practical use scenarios Home kitchen sprouting: use the sleeve on a widemouth mason jar to shield sprouts from ambient light while germinating seeds like alfalfa or mung beans on a kitchen counter. Microgreens and sprouts rotation: switch sleeves on and off to adjust light exposure for different sprouts in multiple jars, helping you optimize growth conditions without separate equipment. Educational or demonstration setting: use multiple sleeves on different jars to illustrate how controlling light affects sprouting, ideal for classrooms or workshops.