diff --git a/safer_wearables/sops/participation/device_preparation.md b/safer_wearables/sops/participation/device_setup.md
similarity index 95%
rename from safer_wearables/sops/participation/device_preparation.md
rename to safer_wearables/sops/participation/device_setup.md
index fba4c6b..90c660c 100644
--- a/safer_wearables/sops/participation/device_preparation.md
+++ b/safer_wearables/sops/participation/device_setup.md
@@ -1,15 +1,15 @@
 ---
 layout: default
-title: 3.01 Participation - Device Preparation
+title: 3.01 Participation - Device Setup
 parent: SOPs
 grand_parent: SAFER Wearables
 has_children: false
 ---
 
-# Device Preparation
+# Device Setup
 {: .no_toc }
 
-This page provides details of how devices are prepared to be sent to participants of the SAFER Wearables Study.
+This page provides details of how devices are setup ready to be sent to participants of the SAFER Wearables Study.
 {: .fs-6 .fw-300 }
 
 ## Table of contents
@@ -20,6 +20,10 @@ This page provides details of how devices are prepared to be sent to participant
 
 ---
 
+## Cleaning
+
+All devices should be cleaned using wipes.
+
 ## Bittium Faros 180
 
 1. Connect the device to a Windows PC via USB.
diff --git a/safer_wearables/sops/participation/mail_pack_preparation.md b/safer_wearables/sops/participation/mail_pack_preparation.md
index 3042cce..563f9b1 100644
--- a/safer_wearables/sops/participation/mail_pack_preparation.md
+++ b/safer_wearables/sops/participation/mail_pack_preparation.md
@@ -6,7 +6,7 @@ grand_parent: SAFER Wearables
 has_children: false
 ---
 
-# Sending Mail Packs
+# Mail Pack Preparation
 {: .no_toc }
 
 This page describes how to put together a Mail Pack to be sent to a participant.
@@ -20,22 +20,43 @@ This page describes how to put together a Mail Pack to be sent to a participant.
 
 ---
 
-## Device setup
+## Preparation
 
-Ensure the devices have been setup as detailed in the [device setup SOP](./device_preparation). Currently, we are using the following three devices:
+Ensure the devices have been setup as detailed in the [Device Setup SOP](./device_setup). Currently, we are using the following three devices:
 - Bittium Faros 180
 - PulseOn OHR Tracker
 - PulseOn Arrythmia Monitor
 
+## Printing
+
+Ensure that the following are printed:
+- 2 x return labels
+- Instruction leaflet
+- Questionnaire (including the participant ID)
+
 ## Prepare mail pack
 
-Prepare a mail pack consisting of:
+Prepare two bags each consisting of:
+- Bag: currently using polyethene bags measuring 350x405 mm
+- Return address label: a label on each bag stating "If undelivered please return to: SAFER Wearables Study; Strangeways Research Laboratory; 2 Worts Causeway; Cambridge; CB1 8RN".
+
+
+Prepare a device box consisting of:
 - A cardboard box (currently using brown boxes measuring 240x240x40mm)
 - Foam inserts (currently using three pieces of foam: one at the bottom and top measuring 6 mm thick, and a middle layer measuring 25mm thick).
-- Bags: one for outward, and one for return (currently using polyethene measuring 350x405 mm). Both with return address labels.
-- Instruction leaflet
-- Questionnaire
 - Three wearable devices (already set up)
 - Charger for the PulseOn Arrythmia Monitor
 - Check that there is an electrode cable already in the Bittium Faros device
-- Electrodes in an envelope (8 electrodes)
\ No newline at end of file
+Selotape the device box shut.
+
+Prepare a return envelope consisting of:
+- Questionnaire
+- Return bag (with return label)
+- A5 Envelope stating "To open when ready to return devices. Contains: (i) Questionnaire; (ii) Return bag (for the box to be put in)."
+Put the questionnaire and return bag in the envelope, and selotape it shut. Then selotape the return envelope to the device box.
+
+
+Prepare a mail pack by taking the remaining bag and putting in it:
+- Device box
+- Instruction leaflet
+- Chest dots envelope
\ No newline at end of file