Cervical Neck Roll Memory Foam Pillow, Bolster Pillow, Round Neck Pillows Support for Sleeping | Bolster Pillow for Bed, Legs, Back and Yoga https://smile.amazon.com/dp/B07XGMMXY2/ref=cm_sw_r_apan_i_D602CF9QQ1DYM89DY567

Love this one!! I use it for back and side sleeping, keeping it right under my neck. Otherwise the adjustable cervical pillows with 3 layers of foam are really good too