Beware this is the RumbleRoller EXTRA FIRM, if you have never used a RumbleRoller you should try the original density FIRST.
FOAM ROLLERS MERELY COMPRESS MUSCLE
When you roll on a conventional foam roller, a compressive force is generated. The amount of compression depends on the size of the contact patch between the roller and your skin. For a typical 6" diameter foam roller, that contact patch is large, so the amount of compression is small and the effect on deeper tissues is very limited.
To counter this limitation, athletes often progress to smaller and harder rollers, or even PVC pipe. A downside of that approach is that smooth, hard rollers don't conform to the shape of your body. While they may have the intended effect in some areas, they don't work well around bony areas - e.g. your pelvis, spine, and scapula.
RUMBLEROLLERS GO DEEPER
In 2009, RumbleRoller forever changed foam rolling with the introduction of the first deep-tissue roller. It's high-profile bumps penetrate deeper into the muscle, and large inter-bump spaces provide room for soft tissue displacement. Furthermore, the bumps' resilience enables them to deflect around bones and get closer than ever to the source of your problem.
LIKE A DEEP-TISSUE MASSAGE
As you roll on a RumbleRoller, its firm but flexible bumps work like the thumbs of a massage therapist to knead and stretch your muscles. This action erodes trigger points, helps restore flexibility, and brings quick relief to common types of muscular pain.
ROCK AND ROLL
RumbleRoller's massaging action can be further intensified by switching from a rolling motion to a side-to-side rocking motion. The bumps provide a wiping-type massage pressure when rolling, but are more resistant to flexion when loaded sideways, and dig in even deeper. This RumbleRoller-exclusive feature is especially useful on dense muscles (e.g. your calves) and hard-to-roll areas (e.g. your upper lat).
3 SIZE OPTIONS
RumbleRollers are available in three different sizes, and all have the same feel due to their identical bump size and spacing.
Before buying your RumbleRoller, consider how and where it will be used. If your roller will be kept at one location such as your home or gym, buy the longest one you can afford. Its extra length will allow you to do more types of movements and transition more easily between movements. If you travel with your roller, choose one that's small enough to pack and carry.
Full-size
6" dia x 31" long (150 x 790mm)
The ultimate deep-tissue roller for gyms and professional users.
Midsize
5.5" dia x 22" long (140 x 550mm)
Long enough to roll your full back or both legs at once, but less costly and easier to store than the Full-size.
Compact
5" dia x 13" long (125 x 330mm)
Perfect for travel - fits inside most gym bags and suitcases.