A Bhāvanā (4) (supportive contemplation) of the Ahiṃsā Mahāvrata (the first great vow of Ahimsa);
to make use of clothes, utensils, wooden plank etc., without any attachment and aversion, for strengthening of asceticism as well as protecting oneself from heat, cold, mosquito-bites etc.
saṃjamassa uvabūhaṇaṭṭhayāe vātātava-daṃsamasaga-sīyaparirakkhaṇaṭṭhayāe uvagaraṇaṃ rāgadosarahiyaṃ pariharitavvaṃ saṃjateṇa... evaṃ āyāṇabhaṃḍanikkhevaṇāsamitijogeṇa bhāvito bhavati aṃtarappā.
(Praśna 6.21)