To do Rinjani mountain trek. its important that you be of at least above fitness and should be able to carry your own load of personal day pack through the trekking. You better be prepare for Rinjani terk.
Personal recommended items to bring:
1. Suitable walking shoes / warm clothing / wind breaker / rain coat
2. Gloves / extra socks / Small towel / hat / tissue paper
3. High energy food (chocolates, nuts, raisins)
4. Headache tablets / lip gloss / deep heat lotion ( Sun block)/ plasters
5. Torch light / walking stick / waterproof bag for camera
6. 2 or 3 T-shirt / long trouser / short / swim cloth