Kriega says:

A NEW version of the popular OS-BASE that is specifically designed to fit the HONDA CRF300L & CRF300 RALLY.

The OS-BASE is an 'over the seat harness' which allows , or ADVENTURE PACKS to be mounted as soft panniers. No additional frames are required, this system provides a super-tough, lightweight carrying solution for the CRF 300 / 300 RALLY with no drilling or permanent bodywork alterations to the bike.

The modular design enables you to modify your luggage set-up to suit your ride - from a day’s single track to longer moto-camping adventure trips.

The BOLT-ON LOOPS & SUBFRAME LOOPS included, attach to the bike’s subframe and CRF Alloy Mounts to provide 4 optional hook-on points. Used in conjunction with the additional loops on the OS-BASE they provide various mounting points for a 3 or more bag set-up, or can be used to mount an OS-PACK as a stand alone tail pack without the OS-BASE.

The set length straps make mounting a breeze and the purpose designed main body shape provides a tight, secure fit with plenty of distance from the exhaust. It takes less than a minute to mount the system to the bike and just seconds to remove it.

HONDA CRF300L / CRF300 RALLY FITTING GUIDE PDF 

BUYING OPTIONS
OS-BASE HONDA CRF300 ONLY
OS-BASE HONDA CRF300 COMBO 12 - OS-BASE CRF300 PLUS 2 x OS-6 PACKS
OS-BASE HONDA CRF300 COMBO 24 - OS-BASE CRF300 PLUS 2 x OS-12 PACKS
OS-BASE HONDA CRF300 COMBO 36 - OS-BASE CRF300 PLUS 2 x OS-18 PACKS