【DOUBLE SAVE ALL LIGHT】:The GA grow tent uses high density 600D Oxford cloth,and it is lined with 98%-reflective silver colored PET mylar.It is great to save all light into the tent.Heavy duty explosion-proof zipper and double stitching protect the tent from light leaking simultaneously. 【OBSERVING EASIER】：Our doors can be opened smoothly, and the observation window makes it easy to view the interior and observe plant growth. 【HIGH-QUALITY MATERIAL】：The top-quality 600D canvas is tear proof and double stitched for perfect light blocking;Thick tent material reinforced by the metal poles ensures security and stability.