When shopping for a foam roller, consider these three factors:
Density is a key factor in how effective they are at deep-tissue massage. 
- Softer rollers are great for beginners or those who want gentler pressure. 
 - Denser (harder) rollers provide deeper, more intense muscle release and are more durable.
 
Surface texture: 
- Smooth rollers provide even pressure across the entire length of the roller. 
 - The ridges and knobs on textured rollers target knots and more precise massaging.  
 
Shape and size affect how you'll use it. 
- Long rollers are versatile and stable, a good choice for a first foam roller. 
 - Shorter lengths target smaller areas like arms and calves; they're also more portable.
 
 Read full article: How to Choose Foam Rollers