Convertibility: These can convert to Boost QRx141 but only with adaptors (sold separately)

What are the different types for:

ACTIVITY: Accessories

Chest pocket

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100 Percent Surpass Elbow Guard - S - Black NoAusPost Convertibility: These can convert toThe 100% Surpass offers the high levels of protection demanded by Downhill and Enduro riders. With a protective plastic cup, strategically placed foam padding and a rubberised outer skin, your elbows will be well protected from the rocks, roots and compacted dirt waiting for you on the trails. Who's this item for: They are designed primarily for Downhill and Enduro riders, but are well ventilated and could be used for Trail riding as well. Protection