Level 96 summoners can use this pouch to summon a Spirit Pack Yak which:
Fights for you (level 175 - gives strength xp).
Carries up to 30 items.
Lasts for 58 minutes.
Notes:
Made at a Summoning obelisk while having a crimson charm, 211 shards, a summoning pouch and one yak-hide in inventory: gives 422.4 xp. Using it costs 10 summoning points and gives 4.8 xp.