Sankhuwasabha Education Scholarship Foundation (SESF) is a non-profit organization established in 1997 in Khandbari, Nepal that offers socially constructive trekking programs in the Makalu and Arun Valley regions. The treks are organized by Makalu Arun Social Trek (MAST), which was established in 2010, to facilitate sustainable tourism with the local communities. A portion of the funds generated from the treks support SESF's child education and Khandbari orphanage programs. The letter invites the recipient to learn about an alternative trekking experience that includes volunteering opportunities to experience local life and traditions in a flexible way.