【Spine Alignment】The smooth spine alignment pillow is designed to support your spine and promote proper alignment while you sleep. Helps reduce pressure on lower back, hips, and knees by maintaining proper sleeping posture throughout the night 【Improves Blood Circulation】If you’ve woken up with tingling limbs or swollen legs, you might have poor circulation to blame. The elevation of putting a extra case for alignment pillow between your legs will help blood flow 【Comfortable Design】The alignment pillows is made of high - quality materials, Memory foam knee pillow with contoured shape perfectly aligns hips, spine, and legs while sleeping on your side 【Adjustable fit】The revoget alignment pillows for side sleepers feature elastic straps to keep the pillow securely between your legs while you sleep. No adjustments are required throughout the night. 【Small and Convenient Size】Measuring 9.06*5.12*9.8inches, this pillow fits perfectly between your legs and is suitable for any bed size. Its lightweight design makes it easy to position and carry, In addition, we give you a storage bag so you can enjoy it anytime, anywhere